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Have all your A/V and electronics questions answered here. Ipods, A/V, Radar Detectors Oh My!

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Old 03-11-2016, 04:35 PM   #1021
BMW 740iL NL
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Pete, can you explain how and where to install a ground-loop isolator in the audio path? Do you mean in the L+R path where you also suggest to cut traces at the red lines?

Last edited by BMW 740iL NL; 03-11-2016 at 04:55 PM.
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Old 03-11-2016, 04:54 PM   #1022
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CDC pin out

Found this on the interwebs
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Old 03-11-2016, 10:48 PM   #1023
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red and white for L&R, 1 white for 24 bits/192KHz goodness and 2 black wires: 2x ground?
Pinout diagram:
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Old 03-12-2016, 12:11 PM   #1024
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Hey,
I'm still trying to figure out how to fix my problem, but I can not do it if I don't understand how things work I'm not very good in electronics and English is not my native language so please be patient with me . I bought pibus while ago, used it together with Rpi 2 and digi+ (because my car has DSP). I used directions provided by Pibus.info site and everything worked with some minor glitches. I used only for few hours and took it out since I knew that my car will not be in use for few months. Now few days ago I tried to put it back but there was no video signal (black screen). No problems with audio, hdmi or trrs cable (bought together with pibus). I checked all conections, trrs cable and replaced TV module. Now here few options I have in mind:
1. To cut TRRS cable and connect video signal directly to 13 and 14 pins in tv module
2. To use HDMI cable, cut it and connect video signal directly to 13 and 14 pins in tv module
Should it work? And than I'm left with 17 pin and I'm not sure what I suppose to do with it. Another thing I don't get how audio signal travels. Is it Rpi--->Pibus--->digi+--->CAR audio or Rpi----> digi+--->CAR?
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Old 03-13-2016, 09:07 AM   #1025
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The Pi3 has changed its serial ports, so it's not compatible for now. Problems: https://www.raspberrypi.org/forums/v...38223&start=25

A Pi2 with USB bluetooth will be better.
Okay, tnx, will go for that then. Any suggestions for bluetooth dongle and integration with the Pibus4 setup? Seems like there are a few adapters not working with the Raspberry Pi 2

Also, I was looking for an "CDC extention wire" so I can connect the cables in the armrest of the X3 and lead them to the trunk so that I can mount the Pibus there and connect it to the tvtuner. Any suggetions? Will be needing aprox. 3m cable with female and male 3 and 6pin connectors.

Found this (https://www.ecstuning.com/ES200589/). Would be perfect if the length was ideal from armrest to trunk and if it had female connectors instead of the joined.
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Old 03-13-2016, 07:35 PM   #1026
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Okay, tnx, will go for that then. Any suggestions for bluetooth dongle and integration with the Pibus4 setup? Seems like there are a few adapters not working with the Raspberry Pi 2
Maybe the Pi3 is fine to use now, but the built-in BT is probably not going to be usable. I'll let somebody else suggest a USB dongle.
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Old 03-13-2016, 11:04 PM   #1027
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Originally Posted by donis86 View Post
Hey,
I'm still trying to figure out how to fix my problem, but I can not do it if I don't understand how things work I'm not very good in electronics and English is not my native language so please be patient with me . I bought pibus while ago, used it together with Rpi 2 and digi+ (because my car has DSP). I used directions provided by Pibus.info site and everything worked with some minor glitches. I used only for few hours and took it out since I knew that my car will not be in use for few months. Now few days ago I tried to put it back but there was no video signal (black screen). No problems with audio, hdmi or trrs cable (bought together with pibus). I checked all conections, trrs cable and replaced TV module. Now here few options I have in mind:
1. To cut TRRS cable and connect video signal directly to 13 and 14 pins in tv module
2. To use HDMI cable, cut it and connect video signal directly to 13 and 14 pins in tv module
Should it work? And than I'm left with 17 pin and I'm not sure what I suppose to do with it. Another thing I don't get how audio signal travels. Is it Rpi--->Pibus--->digi+--->CAR audio or Rpi----> digi+--->CAR?
It worked before, and now it stopped? I guess that sounds like hardware, maybe a loose wire.

You cannot use HDMI, it's a totally different video standard.
Could you connect the TRRS output (from Pi) to a television to test it? You can see where the video comes out:
(PiBus doesn't use the Left/right in the TRRS cable, it's only for video and ground).


Do you have early tv module (around 1998-1999) that has a quirk where you have to enter the Television menu, before the camera input (Pibus uses camera input) will work?

In your setup, the sound goes Rpi----> digi+--->CAR only. Pibus is not involved.

Last edited by PeteAU; 03-13-2016 at 11:04 PM.
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Old 03-14-2016, 06:56 AM   #1028
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Now everything is working, including audio (had to switch iPod with CDC cable in the back of the radio), I've started work on further adapting the skin to make as much as possible readable on the small screen. I started with the great work from @spudooli and added the topbar and bottombar. I want to make the sidebar readable this week, so I can use it in the car as well. Are there any more requests?

The modified skin can be found on: https://github.com/timanrebel/skin.mimic Just download the zip. I will clean up the repo a bit, because I see that OSMC has added some fonts and will post new updates there as soon as I have finished them

Is someone interested in a installer script to run the pibus on OSMC instead of OpenElec btw? I can create it based on my changes.
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Old 03-14-2016, 08:23 AM   #1029
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Is someone interested in a installer script to run the pibus on OSMC instead of OpenElec btw? I can create it based on my changes.
I am interested. Can you give us your pros & cons for the OSMC install vs OpenElec?
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Old 03-14-2016, 09:01 AM   #1030
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I am interested. Can you give us your pros & cons for the OSMC install vs OpenElec?
The main reason for me to choose OSMC is that OSMC is a full Linux distribution running Debian. OpenElec is stripped down to be a very solid and fast mediacenter, but I wanted to add tethering via an iPhone, sync my media library with my NAS at home via an OpenVPN connection, etc.

The con of OSMC is that it is a fully working Linux distribution It is easier to brake if you don't know what you are doing. They offer automatic updates, just like OpenElec, so that is not an issue. I think the choice between OSMC and OpenElec should depend on whether you want to do more than just run Kodi on the Raspberry Pi.

Last edited by timanrebel; 03-14-2016 at 09:04 AM.
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Old 03-15-2016, 04:51 AM   #1031
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Is someone interested in a installer script to run the pibus on OSMC instead of OpenElec btw? I can create it based on my changes.
im also interested

Last edited by miikew; 03-15-2016 at 04:51 AM.
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Old 03-15-2016, 08:59 AM   #1032
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Can anyone tell me model/part number for these little things on Pibus board (sorry for the picture quality)? Q1,Q2 (WJV 3n) and D3,D4 (5C J). I can not find it on google.
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Old 03-15-2016, 09:05 AM   #1033
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It worked before, and now it stopped? I guess that sounds like hardware, maybe a loose wire.

You cannot use HDMI, it's a totally different video standard.
Could you connect the TRRS output (from Pi) to a television to test it? You can see where the video comes out:
(PiBus doesn't use the Left/right in the TRRS cable, it's only for video and ground).

Do you have early tv module (around 1998-1999) that has a quirk where you have to enter the Television menu, before the camera input (Pibus uses camera input) will work?

In your setup, the sound goes Rpi----> digi+--->CAR only. Pibus is not involved.
I will test with TV if I find right cable. Not sure about TV module but I tryied playing with television menu and that made no difference, plus it worked before and I tryed different TV module. Now I'm wondering if I somehow put power/ibus cable into TV/video socket and damaged the board.
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Old 03-15-2016, 01:47 PM   #1034
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Originally Posted by BMW 740iL NL View Post
red and white for L&R, 1 white for 24 bits/192KHz goodness and 2 black wires: 2x ground?
I guess the extra wires aren't the solution - I believe I've got 3 wires in mine (been a while since I looked so I could be way off).

Really can't figure it out, the Pibus v1 I initially had worked perfectly with no noise. I may try and dig it out if I can find it and see if that's still the case. Would hopefully let me know if it's an issue with the Pi/Pibus or if it's still the car being a pain in the backside
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Old 03-16-2016, 04:24 AM   #1035
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I will test with TV if I find right cable. Not sure about TV module but I tryied playing with television menu and that made no difference, plus it worked before and I tryed different TV module. Now I'm wondering if I somehow put power/ibus cable into TV/video socket and damaged the board.
If you put the power cable into the 3-pin TV MOD plug by accident, I guess you sent +12V into the Pi's composite video. Maybe that's what burnt out, rather than parts on the pibus board.
It's probably best to test the Pi alone with a TV. You can hold the TRRS cable to a RCA cable and get a crude connection.
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Old 03-16-2016, 07:02 AM   #1036
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i did it last month, after that composite stop working, after removing few components smd from rpi2 (capacitors, diode etc) rpi2 works normally except composite output, i just bought another one.
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Old 03-16-2016, 07:53 AM   #1037
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I guess the extra wires aren't the solution - I believe I've got 3 wires in mine (been a while since I looked so I could be way off).

Really can't figure it out, the Pibus v1 I initially had worked perfectly with no noise. I may try and dig it out if I can find it and see if that's still the case. Would hopefully let me know if it's an issue with the Pi/Pibus or if it's still the car being a pain in the backside
About the mod on the previous page: https://forum.e46fanatics.com/showthr...3&page=51#1017

Do you reckon you could try something like that, is it within your soldering experience? If I sent you the parts, or show you where to get them off ebay (they cost virtually nothing)?

I looked at the schematic of the Pi's internal audio (used by PiBUS2), compared to PIBUS4 and it's really similar, except these two missing caps. My car doesn't exhibit the loop unfortunately, so somebody else needs to check it. I don't know if it's your answer, maybe 50/50 chance.


* PiBUS4 is basically the same as this, but without C48, C34.
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Old 03-16-2016, 08:28 AM   #1038
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I updated the fork of the Mimic skin to version 3 of the original Mimic skin and redid most of the work that was done before: https://github.com/timanrebel/skin.mimic



I liked having a bottom bar showing the now playing when selecting other songs, instead of the top right as it is now. Maybe I will change it back in the future

Last edited by timanrebel; 03-16-2016 at 08:34 AM.
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Old 03-16-2016, 01:47 PM   #1039
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I liked having a bottom bar showing the now playing when selecting other songs, instead of the top right as it is now. Maybe I will change it back in the future
Nice!

I'm looking for a metal case which fits both Raspberry Pi 2 B and the Pibus4. Does anyone have a suggestion? What have you guys got?
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Old 03-17-2016, 02:52 AM   #1040
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If you put the power cable into the 3-pin TV MOD plug by accident, I guess you sent +12V into the Pi's composite video. Maybe that's what burnt out, rather than parts on the pibus board.
It's probably best to test the Pi alone with a TV. You can hold the TRRS cable to a RCA cable and get a crude connection.
You were right! My Pi's composite video is not working.Thank you for help. Before I buy new Pi can you confirm that using HDMI--->RCA'----> TRRS cable conversion will not solve my problem? If so should I stick with Pi2 or should I get Pi3 (I saw that some guys on this forum is working on Pi3 to work with pibus).
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